﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace TwitterTrendsSilverlightWebPart
{
    public partial class App : Application
    {
        internal IDictionary<string, string> AppInitParams;
        private RichTextBox _rtb;

        public App()
        {
            this.Startup += this.Application_Startup;
            this.Exit += this.Application_Exit;
            this.UnhandledException += this.Application_UnhandledException;

            InitializeComponent();
        }

        private void Application_Startup(object sender, StartupEventArgs e)
        {
            AppInitParams = e.InitParams;
            this.RootVisual = new MainPage();
        }

        private void Application_Exit(object sender, EventArgs e)
        {

        }

        private void Application_UnhandledException(object sender, ApplicationUnhandledExceptionEventArgs e)
        {
            // If the app is running outside of the debugger then report the exception using
            // the browser's exception mechanism. On IE this will display it a yellow alert 
            // icon in the status bar and Firefox will display a script error.
            if (!System.Diagnostics.Debugger.IsAttached)
            {

                // NOTE: This will allow the application to continue running after an exception has been thrown
                // but not handled. 
                // For production applications this error handling should be replaced with something that will 
                // report the error to the website and stop the application.
                e.Handled = true;
                Deployment.Current.Dispatcher.BeginInvoke(delegate { ReportErrorToDOM(e); });
            }
        }

        private void ReportErrorToDOM(ApplicationUnhandledExceptionEventArgs e)
        {
            try
            {
                string errorMsg = e.ExceptionObject.Message + e.ExceptionObject.StackTrace;
                errorMsg = errorMsg.Replace('"', '\'').Replace("\r\n", @"\n");

                System.Windows.Browser.HtmlPage.Window.Eval("throw new Error(\"Unhandled Error in Silverlight Application " + errorMsg + "\");");
            }
            catch (Exception)
            {
            }
        }

        private void richTextBoxForTweet_Loaded(object sender, RoutedEventArgs e)
        {
            if (sender != null)
                _rtb = sender as RichTextBox;
        }

        private void textBoxForTweet_Loaded(object sender, RoutedEventArgs e)
        {
            if (sender != null)
            {
                string originalText = (sender as TextBlock).Text;
                CreateTweetForDisplay(originalText);
            }
        }

        private void CreateTweetForDisplay(string originalText)
        {
            Paragraph tweetParagraph = new Paragraph();
            string[] tweetWords = originalText.Split(' ');
            foreach (string word in tweetWords)
            {
                if (word.StartsWith("@") || word.StartsWith("#") || word.ToLower().StartsWith("http://") || word.ToLower().StartsWith("https://"))
                {
                    AddHyperLink(word.ToLower(), ref tweetParagraph);
                }
                else
                    tweetParagraph.Inlines.Add(word + " ");
            }
            _rtb.Blocks.Add(tweetParagraph);
        }

        private void AddHyperLink(string word, ref Paragraph tweetParagraph)
        {
            Hyperlink hyper = new Hyperlink();
            hyper.Foreground = new SolidColorBrush(Color.FromArgb(255, 214, 65, 8));
            hyper.Inlines.Add(word);
            hyper.TargetName = "_blank";
            string linkType = word.Substring(0, 1);
            switch (linkType)
            {
                case "h":
                    hyper.NavigateUri = new Uri(word);
                    break;
                case "@":
                    hyper.NavigateUri = new Uri(string.Format("http://twitter.com/{0}", word.Remove(0, 1)));
                    break;
                case "#":
                    hyper.NavigateUri = new Uri(string.Format("http://twitter.com/search?q=%23{0}", word.Remove(0, 1)));
                    break;
            }
            tweetParagraph.Inlines.Add(hyper);
            tweetParagraph.Inlines.Add(" ");
        }
    }
}
